wxDataViewMainWindow::OnPaint() always used the white brush to erase the control background which was wrong, change it to use the background colour of the control. Also add tests for setting wxDataViewCtrl foreground and background colours to the dataview sample. git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@62153 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775